Machine for turning off crank-pins, &amp; c.



N0. 647,696. Patented Apr. I 7, I900.

a. L. cL0vER. MACHINE FOR TURNING OFFCRANK PINS, 866.

(Application filed June 5, 1899.)

(No Model.) 2 Sheets-Sheet I.

wedded Inna/61:-

ZZOZ 6 m: nonms PETERS co, FHOTO-LITNO., wswmawu. u. c.

No. 647,696. Pafenked Apr. :7, 1900.

B. L. CLOVER. MACHINE FUR TURNING OFF CRANK PINS, 81.0.

(Application filed June 5 1899.)

2 Sheets-Sheet 2.

(No Model.)

74a AZZ FWZQ m: Ronms PETERS co, PHOtO-LWHCL, WASHINGTON, o c.

BENTON L. CLOVER, OF CHICAGO, ILLINOIS.

MACHINE FOR TURNING OFF CRANK-PINS, 81.0.

SPECIFICATION forming part of Letters Patent No. 647,696, dated April 17, 1900. Application filed June 5,1899- $erial Not 719,351. (No model.) 7

T0 aZZ whom, it may concern.-

Bev it known that I, BENTON L. CLOVER, a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Machines for Turning 01f Crank-Pins, VVrist- Pins, or the Like, of which the following is a full, clear, and exact description.

This invention has for its object to provide a simple, cheap, durable, and efiective construction of machine whereby the crank-pins of engines may be quickly and-accurately turned off or trued without the necessity of removing such part from the engine and without the necessity of putting the engine for any considerable length of time out of service. cable, however, to the turning oif or truin g of crank-pins, may be used with advantage in truing the ends of journals or shafts and in other situations.

The invention consists in the several features of improvement hereinafter described,

illustrated in the accompanying drawings,

and particularly defined at the end of this specification.

Figure 1 isa view in vertical section through my improved machine. Fig. 2 is a View in side elevation, parts being broken away. Fig. 8 is a view in front elevation, parts being broken away. Fig. 4 is a plan view. Fig. 5 is a rear end view. Fig. 6 is a view in vertical cross-section on line 6 6 of Fig. 2.

A designates the main frame of the machine, in the upper part of which frame is formed a long bearing a for the clrive-shaft B, that carries at its front end the gear-wheel b and at Preferably, I

may be adjustable or expansible, if desired. To the upwardly-extending part a of the frame A is rigidly attached the projecting The invention, while especially applistud or shaft F, upon which is revolubly mounted the long sleeve G, one end of which is shown as abutting against the head g of the stud or shaft G, while the opposite end abuts against the raised portion a of the frame. The sleeve G is provided with a spline or feather g, extending lengthwise thereof and engaging a corresponding seat formed in the hub of the gear-cylinder H, that is mounted in manner free to slide lengthwise upon the sleeve G,while it revolves therewith by reason of the connecting spline or feather g. The gear-cylinder H is provided throughout its length with teeth that engage with the corresponding teeth of the gear-pinion Z) on the inner end of the drive-shaft B. To the rear end of the cylinder H is conveniently fastened, as by the screws in, a suitable tool-holding support or bracket K, the end of which is formed with a slide-rest It to receive the slide L, that carries the tool M. The tool M may be held in the slide-rest by the elamping plate m or in any other suitable or convenient manner. The slide L is shown as provided with a rearwardly-projecting arm Z, through which passes a screw-rod N, the threaded lower end of which enters a correspondingly threaded socket in the bracket K, the upper 'trued.

The front end of the gear-cylinder H is provided with a threaded hole, through which passes a correspondingly-threaded feed-screw P, the outer end of this feed-screw being j ournaled in an arm 0 formed on or projecting from the forward end of the sleeve G, and the feed-screw has fixed thereto a spur-wheel S,

adapted to contact with a bar or finger T,

that is fastened to the main frame A and extends into position to engage the spur-wheel V 25, whereby the finger is held in desired position,.and, if desired, several fingers or pins projecting from the frame may be used in order to act upon the spur-wheel and effect the more rapid advancement of the tool.

In order to enable the mechanism to be properly centered and rigidly secured with re spect to a crank-pin or like part to be turned off, I have provided the end of the stud or shaft F with a screw W, that projects beyond the base of its head 9. Preferably the screw W is formed separate from the stud or shaft F and has a threaded portion that enters a correspondingly-threaded socket "or sea-ti in the end of the'stud or shaft F. The serew W not onlyenables the exact centering of the ,lathe with. respect to the crank-pin or like part to be turned ofi, but also rigidly unites the-end of the stud or shaft F to the crankpin, and thus insures the accurate travel'of the toolaround the pin. By forming the centering-screw W separate from the stud o'r shaft F this screw can be replaced by screws of larger or smaller size, as may be desired. From the foregoing description the operation of my improved machine will be seen to be as follows: When a crank-pin is to' be turned, a screw-threaded socket will be first formed at the center of the pin to receive the outer end of the centering-screw W.. The centering-screw W will then bescrewed in such socket untilthe'head G is brought to' to proper working position with respect to thefsurfaceof. the crank-pin X, the cylinder I H being at such time in the position shown in Fig. 1 of thedrawings. then turn the wheel D, and through the medium of the gear-wheel b, the drive-shaftB,

and pinion b will vcause the gear-cylinder H to revolve about the fixed stud 0r shaftF, and as this gearacylinder carries with it the tool-holding frame and tool it'will be seen that the tool willbe caused to travel around the surface of the crank-pin or like part be- At each revolution of the ing operated upon. cylinder H an arm or tooth of the spur-wheel S will contact with the arm or finger T, and the feed-screw P will thus be turned so as to cause a corresponding advance feed of the cylinder H, and hence of the tool M; but the teeth of. the, cylinder H will remain in constant gear with the pinion b. When the tool M has reached the limit of itstravelin outward direction, the operator may reversethe position of the tool, as shown by dotted lines in Fig. 2, so asto enable the tool to 0perate close to the outer flange or rim of the,

craukspin, and by then reversingthe direction of the crank-wheel the tool may be caused to travel in the opposite direction or toward the operator; \Vhen required, thetool may be of awrench engaging the squared front end withdrawn from its initial position by means p of the feed-screw P.

The operator will From the foregoing description it will be seen that my invention provides a very sim ple and efiective means whereby crank-pins, wrist-pins, or like parts may be conveniently and quickly trued without the necessity of removing such parts from the engine, and it is manifest that the precise details. of construction above set out may be varied by the skilled mechanic without departing from the scope of the invention. I

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-

' 1. "In apparatus of the character described, the combination with a suitable frame, of a stud or shaft carried by said frame and provided at one end with a centering-screw'adapted to engage a threaded perforation in the end of the pin or like part to be turned, a tool-holding support revolubly mounted upon .said stud or shaft and suitable gear mechan- .the combination with a suitable frame, of a non-revoluble stud orshaft carried by said frame and adapted toengage the pin or like part tobe turned, a sleeve encircling said shaft and revoluble thereon, a tool-holder carried-by said sleeve and movable longitudinally thereof, a suitable gear encircling said sleeve and movable longitudinally with the tool-holder lengthwisethereof and suitable means for imparting rotation and longitudinal movement to said gear. I

3. In apparatus of the character described,

the combination with a suitable frame, of a stud or shaft projecting therefrom. and provided with a sleeve revolubly mounted thereon, a gear-cylinder keyed to said sleeve but movable longitudinally thereon, a tool-holder connected tosaid gear-cylinder, adrive-shaft in gear with said cylinder and suitable means for turning said drive-shaft.

4. In apparatus of the character described, the combination with a main frame, of a stud or shaft F projecting therefrom, a sleeve G revolubly mounted upon said stud or shaft,

a gear-cylinder H keyedto said sleeve Gloutlongitudinally movable thereon, a tool-support K connected to said cylinder H, a pinion b engaging said cylinder H and a driveshaft for operating said pinion.

5. Inapparatus of the character described, the combinationwith a suitable frame, of a fixed stud or shaft projectingtherefrom, a

sleeve revolubly mounted upon said stud or shaft, 9. gear cylinder keyed to said sleeve but longitudinally movable thereon and provided cylinder.

6. In apparatus of the character described,

the combination with a suitable frame, of a fixed stud or shaft projecting therefrom, a

sleeve revolubly mounted upon said stud or adapted to engage said spur-wheel to effect shaft, a gear-cylinder keyed to said sleeve the automatic advancement of said gear-cylbut longitudinally movable thereon and proinder.

Vided with a tool-holding support, a feed- BENTON L. CLOVER. 5 screw connected to said sleeve and engaging Witnesses:

said gear-cylinder, a spur-wheel fixed to said GEO. P. FISHER, J12,

feed-screw, and a suitable finger or part 1 ALBERTA ADAMICK. 

